<template>
	<view>
		
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgColor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" class="right-scroll-view" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				//当前设备可用的高度
				wh: 0,
				cateList: [],
				active: 0,
				//二级分类的列表
				cateLevel2: [],
				//滚动条距离顶部的距离
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50

			this.getCateList()
		},
		methods: {
			//获取分类列表的数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				
				// 修改api返回的参数
				console.log(res.message[0].children[0].children[0].cat_icon)
				
				var sr=res.message[0].children[0].children[0].cat_icon
				sr=sr.replace(/https:\/\/api-ugo-dev\.itheima\.net/g, 'https://api-ugo-web.itheima.net');
				console.log(sr)
				
				// console.log(res.message.children[i].children[j].cat_icon)
				
				for(var i=0;i<res.message.length;i++){
					for(var j=0;j<res.message[i].length;j++){
						for(var k=0;k<res.message.children[i].children[j].length;k++){
							console.log(res.message.children[i].children[j].cat_icon)
							console.log(i)
						}
					}
				}
				
				res.message[0].children[0].children[0].cat_icon = res.message[0].children[0].children[0].cat_icon.replace(/https:\/\/api-ugo-dev\.itheima\.net/g, 'https://api-ugo-web.itheima.net');
				
				
				
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i) {
				this.active = i

				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				
				//让scroolTop的值在0和1之间切换
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			//跳转到商品列表页面
			gotoGoodsList(item3) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' +item3.cat_id
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;
		}

		.left-scroll-view-item {
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;

			&.active {
				background-color: #FFFFFF;
				position: relative;

				&::before {
					content: ' ';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #C00000;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
		
		.right-scroll-view{
			background-color: #FFFFFF;
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>
